What Is the Vertical Force at the Elbow Joint?

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SUMMARY

The vertical force at the elbow joint (FE) can be expressed as the sum of the forces acting on the arm when held horizontally with a dumbbell. The discussion emphasizes that muscles exert opposing forces, which must be accounted for in the equation. The focus is on deriving an expression that relates these vertical forces, indicating that moments will be addressed in subsequent parts of the problem. Clarity in the relationship between the forces is crucial for a complete understanding.

PREREQUISITES
  • Understanding of static equilibrium in physics
  • Knowledge of force vectors and their components
  • Familiarity with the anatomy of the elbow joint
  • Basic principles of torque and moments
NEXT STEPS
  • Research the concept of static equilibrium in biomechanics
  • Study the anatomy and function of the elbow joint
  • Learn about force vector decomposition in physics
  • Explore the principles of torque and how they apply to joint mechanics
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Students in biomechanics, physical therapy professionals, and anyone studying human anatomy and joint mechanics will benefit from this discussion.

annanause
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Homework Statement


State an expression for the vertical force at the elbow joint FE in terms of the other forces acting when the arm is held horizontal with the dumbbell in the hand.
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Homework Equations


No equations needed.

The Attempt at a Solution


Since muscles can not expand beyond their resting length, joints and muscles often exert forces that act in opposite directions and thus subtract.

Am I even close to what I was asked to answer?
 
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annanause said:
Am I even close to what I was asked to answer?
No, the question is asking for an equation relating the forces. It's not entirely clear, but I think it just wants one relating to the sum of the vertical forces; looks like moments get considered later in the question.
 

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